Steward of Names. Painus of Backsidus.
When a person desires to enter The Black Market, it requires one to take several specific steps. First, one must have access to a Port Key or you'll never find the market in the first place. Secondly, you must make an offering of your own blood once you arrive. This ensures you are who you say you are--and it also allows the Gypsies to track your whereabouts at all times during your stay. Third, and most important--you are required to stand in front of Lucian, the Steward of Names, and have your true name and connections read alowed. If Lucian, who happens to be a questionable piece of work himself, approves of you, the doors to the Market will be opened to you--so long as you obey the rules.